Scuba Diving in Mauritius: Best Dive Sites, Levels and Season

The best time to dive in Mauritius is October to December and March to April, when the water is warm, visibility is good and cyclone risk is lower than in January and February. The easiest sites are in the north, around Grand Baie and Trou aux Biches. Deeper dives, such as the Cathedral at Flic en Flac or Coin de Mire, call for experience. An Open Water certificate takes you to 18 m, Advanced Open Water to 30 m.

When is the best time to dive in Mauritius?

You can dive all year, but conditions change. The southern summer, November to April, brings the warmest water, around 28°C, and livelier marine life on the reefs. In winter, May to October, the sea cools to about 22–25°C, and visibility is generally better, with calmer water on the west coast. A 3 mm wetsuit is usually enough.

Dive-travel guides point to October to December and March to April as the best balance of clear and warm water. January and February are the months most exposed to cyclones, so avoid them if you can. Our guide to Mauritius’s climate by season has the detail.

Dive sites by area and level

Guides disagree on both depths and levels. The same site can be rated “all levels” by one and “advanced” by another, depending on exactly where you dive and on the current that day. The table gives the ranges as published; your dive centre has the final say on what your certificate allows on the day.

The north: Grand Baie and Trou aux Biches

This is the busiest area for diving. Merville Patches is shallow and suits anyone starting out or getting back in the water. The Stella Maru is the best-known wreck: a trawler lying at roughly 18–25 m, with large moray eels and reef fish around it. Whale Rock is known for its hammerhead sharks, which guides mention, and it is meant for divers who are already comfortable. The Silver Star, Water Lily and Emily wrecks are for advanced divers only.

Shark’s Trench, at about 12 m, is named after the blacktip reef sharks seen there. For the question of risk, see our article on sharks in Mauritius.

Coin de Mire

The islet lies off the north coast, and boats reach it from Grand Baie. Dives there run from 18 to 50 m depending on the spot and are aimed first at intermediate to advanced divers. Another guide does list beginner dives there, and the islet is also used for snorkelling.

The west: Flic en Flac and the Cathedral

The Cathedral takes its name from its rock blocks and arches, a favourite with photographers. Guides mention groupers, angelfish and squirrelfish. In winter the west coast generally offers calmer water. For property in the area, see real estate in Flic en Flac.

Starting out: from trial dive to certificate

Without a certificate you can still try a trial dive, supervised by an instructor, with an approved operator. To dive independently you need the Open Water certificate. One centre on the west coast advertises it as 3 to 4 days for USD 450–550, with a depth limit of 18 m. Advanced Open Water takes 2 to 3 days, costs USD 400–500 and opens up dives to 30 m. Prices and course lengths vary from one centre to another.

Most centres ask for a medical certificate confirming you are fit to dive. Check too that your travel insurance covers diving to the depth you plan to reach.

How to choose a dive centre

The Mauritius Scuba Diving Association (MSDA), a professional body founded in 1989 and run by volunteers from the trade, is affiliated to CMAS and to the French federation. Several centres also belong to PADI or SSI. A few simple questions before you book:

• Is the centre an MSDA member, and does it work under a recognised training agency (PADI, SSI, CMAS)?
• How many divers per instructor? The French federation’s rules, followed by centres that come under it, set a maximum of four divers per guide.
• How are the cylinders inspected? In March 2025, an employee of a dive centre based in a northern hotel died when a compressor exploded. According to the press, pressure vessels must be tested every two years for corrosive gases and every five years for others, but regular visual inspections are not systematic. Ask how often the centre has its cylinders inspected.
• Are emergency oxygen and first-aid equipment on board?

Diving or snorkelling?

If you are not certified, or you are travelling with children, snorkelling in the lagoon already gets you to the corals and fish with no formalities. Our guide to the best snorkelling spots covers the lagoons of the north, west and south-east and the rules in the marine parks. To understand the state of the reefs, read our article on the coral reefs of the lagoon. Other water sports are covered in the guide to sports and leisure in Mauritius.

Depending on your situation

You are visiting

Stay in the north or the west, where most trips leave from, and book your dives in October to December or March to April. One trial dive or two exploration dives are enough to get a feel for it.

You already live in Mauritius

The Open Water certificate, then Advanced, opens the deeper sites all year round. Regular diving is easiest from the north, near Grand Baie or Trou aux Biches, or from the west.

You are still deciding where to settle

If the sea matters to your choice, compare Grand Baie, Trou aux Biches and Flic en Flac, three bases for diving, or browse our guide to living in the north.

Sources and checks

• Rainbow Tours: dive sites, depths and levels, seasons.
• Wanderlusters: depths of the Cathedral and the Stella Maru, season and water temperature.
• Travelstart: sites in the north and west, wrecks, levels.
• HIDMC: Open Water and Advanced courses, length, prices, medical certificate.
• Scubaverse: Mauritius Scuba Diving Association and supervision rules.
• AllAfrica (press): cylinder safety and the training run by the MSDA, March 2026.